In-line variable substitution for saving many things as one?

[JamesDuBois]

I have a model that I created which involves 4 different outputs that all need to be saved as the same name for the model to work properly. Only one of these "Export Feature Attribute to ASCII" tools is paramaterized though, the others just overwrite that file based on different check box options the user selects. How would I go about saving the files so that the other 3 "Export Feature Attribute to ASCII" tools match the one that is paramaterized? I am very very new/bad at Python...

[JamesDuBois]

here is a photo of the end of the model.. The only "CostMatrix.csv" file that has a parameter is what I want all the others to be named and pathed to.